{"id":3676,"date":"2025-05-25T12:44:45","date_gmt":"2025-05-25T10:44:45","guid":{"rendered":"http:\/\/www.zsvltava.cz\/fyzika\/?p=3676"},"modified":"2026-02-24T12:57:45","modified_gmt":"2026-02-24T11:57:45","slug":"2-priklady-se-zvukem","status":"publish","type":"post","link":"https:\/\/www.zsvltava.cz\/fyzika\/?p=3676","title":{"rendered":"4 p\u0159\u00edklady se zvukem"},"content":{"rendered":"
    \n
  1. Jak daleko je p\u0159ek\u00e1\u017eka, od kter\u00e9 se vrac\u00ed ozv\u011bna za 2 s?<\/li>\n
  2. Mezi z\u00e1bleskem a hromem<\/a> jsme napo\u010d\u00edtali 12 sekund. Jak daleko je od n\u00e1s bou\u0159ka?<\/li>\n
  3. Odrazu zvuku pou\u017e\u00edvaj\u00ed sonary. Ty vys\u00edlaj\u00ed zvukov\u00e9 sign\u00e1ly a zaznamen\u00e1vaj\u00ed odrazy. T\u00edmto zp\u016fsobem se nap\u0159\u00edklad mapuje mo\u0159sk\u00e9 dno. Kolik \u00fadaj\u016f o hloubce lze nam\u011b\u0159it b\u011bhem jedn\u00e9 minuty, pokud se rozhodneme skenovat dno Mari\u00e1nsk\u00e9ho p\u0159\u00edkopu? (11,035 km)<\/li>\n
  4. Za jak dlouho usly\u0161\u00edme dopadnout k\u00e1men na dno Macochy v hloubce 138,4 m?(*)<\/sup><\/li>\n<\/ol>\n

    Dal\u0161\u00ed tucet p\u0159\u00edklad\u016f<\/a><\/p>\n

    \n

    (*)<\/sup> Jeliko\u017e m\u00e1 gravita\u010dn\u00ed konstanta Zem\u011b form\u00e1t t\u00edhov\u00e9ho zrychlen\u00ed<\/strong>, nejedn\u00e1 se u voln\u00e9ho p\u00e1du o pohyb rovnom\u011brn\u00fd, ale pohyb rovnom\u011brn\u011b zrychlen\u00fd.<\/p>\n

    Dr\u00e1hu rovnom\u011brn\u011b zrychlen\u00e9ho pohybu ur\u010d\u00edme podle vztahu:<\/p>\n

      <\/span>   <\/span>\"\[<\/p>\n

    pro voln\u00fd p\u00e1d a = g<\/strong><\/p>\n

    M\u016f\u017eeme tedy vyj\u00e1d\u0159it \u010das:<\/p>\n

      <\/span>   <\/span>\"\[<\/p>\n

    \n

    Obr\u00e1zek propasti Macocha z \u00favodu byl vyp\u016fj\u010den ze serveru: \u017divot na cest\u00e1ch<\/small><\/p>\n","protected":false},"excerpt":{"rendered":"

    Jak daleko je p\u0159ek\u00e1\u017eka, od kter\u00e9 se vrac\u00ed ozv\u011bna za 2 s? Mezi z\u00e1bleskem a hromem jsme napo\u010d\u00edtali 12 sekund. Jak daleko je od n\u00e1s …. <\/p>\n","protected":false},"author":1,"featured_media":3687,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[43,61],"tags":[],"class_list":["post-3676","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-priklady-pro-8-rocnik","category-zvuk"],"_links":{"self":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/3676","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3676"}],"version-history":[{"count":5,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/3676\/revisions"}],"predecessor-version":[{"id":6493,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/posts\/3676\/revisions\/6493"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=\/wp\/v2\/media\/3687"}],"wp:attachment":[{"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3676"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3676"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zsvltava.cz\/fyzika\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}